%% -*- erlang-indent-level: 2 -*-
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2004-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
-module(hipe_ppc_ra_finalise).
-export([finalise/3]).
-include("hipe_ppc.hrl").
finalise(CFG, TempMap, FPMap0) ->
{_, SpillLimit} = hipe_gensym:var_range(ppc),
Map = mk_ra_map(TempMap, SpillLimit),
FPMap1 = mk_ra_map_fp(FPMap0, SpillLimit),
hipe_ppc_cfg:map_bbs(fun(_Lbl, BB) -> ra_bb(BB, Map, FPMap1) end, CFG).
ra_bb(BB, Map, FpMap) ->
hipe_bb:code_update(BB, ra_code(hipe_bb:code(BB), Map, FpMap, [])).
ra_code([I|Insns], Map, FPMap, Accum) ->
ra_code(Insns, Map, FPMap, [ra_insn(I, Map, FPMap) | Accum]);
ra_code([], _Map, _FPMap, Accum) ->
lists:reverse(Accum).
ra_insn(I, Map, FPMap) ->
case I of
#alu{} -> ra_alu(I, Map);
#cmp{} -> ra_cmp(I, Map);
#load{} -> ra_load(I, Map);
#loadx{} -> ra_loadx(I, Map);
#mfspr{} -> ra_mfspr(I, Map);
#mtcr{} -> ra_mtcr(I, Map);
#mtspr{} -> ra_mtspr(I, Map);
#pseudo_li{} -> ra_pseudo_li(I, Map);
#pseudo_move{} -> ra_pseudo_move(I, Map);
#pseudo_tailcall{} -> ra_pseudo_tailcall(I, Map);
#store{} -> ra_store(I, Map);
#storex{} -> ra_storex(I, Map);
#unary{} -> ra_unary(I, Map);
#lfd{} -> ra_lfd(I, Map, FPMap);
#lfdx{} -> ra_lfdx(I, Map, FPMap);
#stfd{} -> ra_stfd(I, Map, FPMap);
#stfdx{} -> ra_stfdx(I, Map, FPMap);
#fp_binary{} -> ra_fp_binary(I, FPMap);
#fp_unary{} -> ra_fp_unary(I, FPMap);
#pseudo_fmove{} -> ra_pseudo_fmove(I, FPMap);
_ -> I
end.
ra_alu(I=#alu{dst=Dst,src1=Src1,src2=Src2}, Map) ->
NewDst = ra_temp(Dst, Map),
NewSrc1 = ra_temp(Src1, Map),
NewSrc2 = ra_temp_or_imm(Src2, Map),
I#alu{dst=NewDst,src1=NewSrc1,src2=NewSrc2}.
ra_cmp(I=#cmp{src1=Src1,src2=Src2}, Map) ->
NewSrc1 = ra_temp(Src1, Map),
NewSrc2 = ra_temp_or_imm(Src2, Map),
I#cmp{src1=NewSrc1,src2=NewSrc2}.
ra_load(I=#load{dst=Dst,base=Base}, Map) ->
NewDst = ra_temp(Dst, Map),
NewBase = ra_temp(Base, Map),
I#load{dst=NewDst,base=NewBase}.
ra_loadx(I=#loadx{dst=Dst,base1=Base1,base2=Base2}, Map) ->
NewDst = ra_temp(Dst, Map),
NewBase1 = ra_temp(Base1, Map),
NewBase2 = ra_temp(Base2, Map),
I#loadx{dst=NewDst,base1=NewBase1,base2=NewBase2}.
ra_mfspr(I=#mfspr{dst=Dst}, Map) ->
NewDst = ra_temp(Dst, Map),
I#mfspr{dst=NewDst}.
ra_mtcr(I=#mtcr{src=Src}, Map) ->
NewSrc = ra_temp(Src, Map),
I#mtcr{src=NewSrc}.
ra_mtspr(I=#mtspr{src=Src}, Map) ->
NewSrc = ra_temp(Src, Map),
I#mtspr{src=NewSrc}.
ra_pseudo_li(I=#pseudo_li{dst=Dst}, Map) ->
NewDst = ra_temp(Dst, Map),
I#pseudo_li{dst=NewDst}.
ra_pseudo_move(I=#pseudo_move{dst=Dst,src=Src}, Map) ->
NewDst = ra_temp(Dst, Map),
NewSrc = ra_temp(Src, Map),
I#pseudo_move{dst=NewDst,src=NewSrc}.
ra_pseudo_tailcall(I=#pseudo_tailcall{stkargs=StkArgs}, Map) ->
NewStkArgs = ra_args(StkArgs, Map),
I#pseudo_tailcall{stkargs=NewStkArgs}.
ra_store(I=#store{src=Src,base=Base}, Map) ->
NewSrc = ra_temp(Src, Map),
NewBase = ra_temp(Base, Map),
I#store{src=NewSrc,base=NewBase}.
ra_storex(I=#storex{src=Src,base1=Base1,base2=Base2}, Map) ->
NewSrc = ra_temp(Src, Map),
NewBase1 = ra_temp(Base1, Map),
NewBase2 = ra_temp(Base2, Map),
I#storex{src=NewSrc,base1=NewBase1,base2=NewBase2}.
ra_unary(I=#unary{dst=Dst,src=Src}, Map) ->
NewDst = ra_temp(Dst, Map),
NewSrc = ra_temp(Src, Map),
I#unary{dst=NewDst,src=NewSrc}.
ra_lfd(I=#lfd{dst=Dst,base=Base}, Map, FPMap) ->
NewDst = ra_temp_fp(Dst, FPMap),
NewBase = ra_temp(Base, Map),
I#lfd{dst=NewDst,base=NewBase}.
ra_lfdx(I=#lfdx{dst=Dst,base1=Base1,base2=Base2}, Map, FPMap) ->
NewDst = ra_temp_fp(Dst, FPMap),
NewBase1 = ra_temp(Base1, Map),
NewBase2 = ra_temp(Base2, Map),
I#lfdx{dst=NewDst,base1=NewBase1,base2=NewBase2}.
ra_stfd(I=#stfd{src=Src,base=Base}, Map, FPMap) ->
NewSrc = ra_temp_fp(Src, FPMap),
NewBase = ra_temp(Base, Map),
I#stfd{src=NewSrc,base=NewBase}.
ra_stfdx(I=#stfdx{src=Src,base1=Base1,base2=Base2}, Map, FPMap) ->
NewSrc = ra_temp_fp(Src, FPMap),
NewBase1 = ra_temp(Base1, Map),
NewBase2 = ra_temp(Base2, Map),
I#stfdx{src=NewSrc,base1=NewBase1,base2=NewBase2}.
ra_fp_binary(I=#fp_binary{dst=Dst,src1=Src1,src2=Src2}, FPMap) ->
NewDst = ra_temp_fp(Dst, FPMap),
NewSrc1 = ra_temp_fp(Src1, FPMap),
NewSrc2 = ra_temp_fp(Src2, FPMap),
I#fp_binary{dst=NewDst,src1=NewSrc1,src2=NewSrc2}.
ra_fp_unary(I=#fp_unary{dst=Dst,src=Src}, FPMap) ->
NewDst = ra_temp_fp(Dst, FPMap),
NewSrc = ra_temp_fp(Src, FPMap),
I#fp_unary{dst=NewDst,src=NewSrc}.
ra_pseudo_fmove(I=#pseudo_fmove{dst=Dst,src=Src}, FPMap) ->
NewDst = ra_temp_fp(Dst, FPMap),
NewSrc = ra_temp_fp(Src, FPMap),
I#pseudo_fmove{dst=NewDst,src=NewSrc}.
ra_args([Arg|Args], Map) ->
[ra_temp_or_imm(Arg, Map) | ra_args(Args, Map)];
ra_args([], _) ->
[].
ra_temp_or_imm(Arg, Map) ->
case hipe_ppc:is_temp(Arg) of
true ->
ra_temp(Arg, Map);
false ->
Arg
end.
ra_temp_fp(Temp, FPMap) ->
Reg = hipe_ppc:temp_reg(Temp),
case hipe_ppc:temp_type(Temp) of
'double' ->
case hipe_ppc_registers:is_precoloured_fpr(Reg) of
true -> Temp;
_ -> ra_temp_common(Reg, Temp, FPMap)
end
end.
ra_temp(Temp, Map) ->
Reg = hipe_ppc:temp_reg(Temp),
case hipe_ppc:temp_type(Temp) of
'double' ->
exit({?MODULE,ra_temp,Temp});
_ ->
case hipe_ppc_registers:is_precoloured_gpr(Reg) of
true -> Temp;
_ -> ra_temp_common(Reg, Temp, Map)
end
end.
ra_temp_common(Reg, Temp, Map) ->
case gb_trees:lookup(Reg, Map) of
{value,NewReg} -> Temp#ppc_temp{reg=NewReg};
_ -> Temp
end.
mk_ra_map(TempMap, SpillLimit) ->
%% Build a partial map from pseudo to reg or spill.
%% Spills are represented as pseudos with indices above SpillLimit.
%% (I'd prefer to use negative indices, but that breaks
%% hipe_ppc_registers:is_precoloured/1.)
%% The frame mapping proper is unchanged, since spills look just like
%% ordinary (un-allocated) pseudos.
lists:foldl(fun(MapLet, Map) ->
{Key,Val} = conv_ra_maplet(MapLet, SpillLimit, is_precoloured_gpr),
gb_trees:insert(Key, Val, Map)
end,
gb_trees:empty(),
TempMap).
conv_ra_maplet(MapLet = {From,To}, SpillLimit, IsPrecoloured) ->
%% From should be a pseudo, or a hard reg mapped to itself.
if is_integer(From), From =< SpillLimit ->
case hipe_ppc_registers:IsPrecoloured(From) of
false -> [];
_ ->
case To of
{reg, From} -> [];
_ -> exit({?MODULE,conv_ra_maplet,MapLet})
end
end;
true -> exit({?MODULE,conv_ra_maplet,MapLet})
end,
%% end of From check
case To of
{reg, NewReg} ->
%% NewReg should be a hard reg, or a pseudo mapped
%% to itself (formals are handled this way).
if is_integer(NewReg) ->
case hipe_ppc_registers:IsPrecoloured(NewReg) of
true -> [];
_ -> if From =:= NewReg -> [];
true ->
exit({?MODULE,conv_ra_maplet,MapLet})
end
end;
true -> exit({?MODULE,conv_ra_maplet,MapLet})
end,
%% end of NewReg check
{From, NewReg};
{spill, SpillIndex} ->
%% SpillIndex should be >= 0.
if is_integer(SpillIndex), SpillIndex >= 0 -> [];
true -> exit({?MODULE,conv_ra_maplet,MapLet})
end,
%% end of SpillIndex check
ToTempNum = SpillLimit+SpillIndex+1,
MaxTempNum = hipe_gensym:get_var(ppc),
if MaxTempNum >= ToTempNum -> ok;
true -> hipe_gensym:set_var(ppc, ToTempNum)
end,
{From, ToTempNum};
_ -> exit({?MODULE,conv_ra_maplet,MapLet})
end.
mk_ra_map_fp(FPMap, SpillLimit) ->
lists:foldl(fun(MapLet, Map) ->
{Key,Val} = conv_ra_maplet(MapLet, SpillLimit,
is_precoloured_fpr),
gb_trees:insert(Key, Val, Map)
end,
gb_trees:empty(),
FPMap).
